Whole House Water Filtration System Installation | Instructions + Diagram (2023)

Written by:gen fitzgerald// Last update:

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A whole-house filtration system delivers clean water throughout your home, so you can enjoy delicious clean water, chlorine-free showers, and lighter clothes at every faucet.

However, this type of water filter requires proper installation that includes plumbing. Does it look scary? It doesn't have to be! Making it all work is only moderately difficult. And with the right tools and enough time and patience, you should be able to set it up yourself.

Just got an idea for your next DIY project? Great! The following article will provide you with everything you need to know.


  • Location: where to install a POE filter?
    • Before or after water softener?
    • Is it a good idea to cycle outdoors?
  • facilities diagram
  • How to install a whole house water filtration system
    • Video
  • time to start

The central theses

Follow these steps to install a whole-house water filter:

  1. Shut off the water supply and depressurize the pipes by opening the nearest outlets
  2. Remove the piece of pipe from the main water line.
  3. Optional: install valves and pressure gauges
  4. Install the entire house filter.
  5. Turn the water back on, rinse and check for leaks.
(Video) iSpring Whole House Water Filter Systems DIY Installation

Location: where is a POE filter installed?

The first question to answer iswhere to install your new whole house water filter.

Obviously, you want to choose a location close to your home's water supply so that you have filtered water at all outlets. The only exception is external faucets, which normally don't need filtered water, but that's up to you!

You also want an easily accessible location so that you can easily service your filtration system, especially replacing cartridges.

Somewhere close to the main shutoff valve and before the water heater is probably the best option. This will increase the lifespan of the heater and the longevity of all your hot water powered appliances as they no longer have to deal with limescale, limescale and whatever else can be present in your water supply.

If you are in a private well, be sure to install theseFilter system after the pressure vessel.

(Video) How to Install a Whole House Water Filter (iSpring WGB22B 2 stage, WSP-50SL)

Our Best POE Water Filtration System? That depends on your situation. Check out our reviews onThe best water filters for the whole houselearn more.

Before or after water softener?

If you install your newWhole house unit before or after fabric softener(If you have one)?

For municipal supplies in front of the softener to protect theion exchangeChlorine the media and rule out possible pressure issues.

For the coating, some specialists provided softener to ensure full flow during backwash. Also, unless you chlorinate your well, your water won't contain any chlorine that needs to be removed.

Another read:

  • The best combinations of water filters and softener systems for home use in 2023
  • Reviews of Our Favorite Whole House Water Filters for Well Water
  • 2023 Reviews and Guide to the Top Rated Whole Household Filter Cartridges
  • Spin Down Sediment Filter Analyzes
  • Cost to install whole house water filter

Is external installation a good idea?

Outdoor mounting isn't entirely out of the question, but putting the entire house filter in the garage or basement is a better option.

facilities diagram

Here is a small installation diagram that you might find useful:

(Video) How to install a WHOLE HOUSE WATER FILTER with PEX plumbing. GE whole house water filter GXWH40L

Whole House Water Filtration System Installation | Instructions + Diagram (1)

Here is a list of installation tools, parts, and supplies needed:

To the Lord

  • Filtration system with the different components.
  • mounts (not all)
  • hoses
  • Accessories (pluggable)
  • stop valves
  • Bypassventil (optional)
  • Manometer (optional)

necessary tools

  • pierce
  • pierce
  • 2x Rollgabelschlüssel
  • pipe cutter or saw
  • Bucket
  • teflon band
  • Screwdriver
  • Welding accessories (optional)

How to install a whole house water filtration system

The good news is that it doesn't matter.which model do you choose, the basic process of installing a whole-house water filtration system is always the same. If you're handy with housekeeping, the whole setup shouldn't take more than an afternoon (2-4 hours).

Here are some step-by-step instructions:

Before you begin, read the manual carefully and be sure to follow local installation codes. If in doubt, contact the manufacturer.

  1. Start by shutting off the main water supply.
  2. Empty the remaining water by opening all taps and fittings. This also relieves pressure.
  3. Cut on the main line. Remove a section of pipe large enough to accommodate your filtration system and all of its components. Have a bucket handy to avoid spills.
  4. Grind the burrs on both ends of the cut pipe.
  5. Remove any debris from inside the tube.
  6. Install a shut-off valve on both sides of the system for ease of maintenance. also considerAdding a Whole House Water Filter Bypass Valveso you have water in your home even when the system is in service mode. Close all valves for now.
  7. If you want to control inlet and outlet pressure, install a pressure gauge next to each isolation valve. So you know at a glance when the time has comechange filters.
  8. If necessary, attach a piece of plywood to the back wall to facilitate assembly.
  9. Now it's time to install the system itself. This requires a lot of dry fitting (flexible tubing is great for this). make sure thatEmYOutside ofThe ports are pointing in the right direction. Use adapters on fittings if your pipe size does not fit. Apply teflon tape to all threaded ends to seal and prevent leaks. Be careful not to overtighten the plastic connectors to avoid cracking. If you use plug-in connections, no soldering is required. If you prefer to solder, make sure the pipe ends are clean and keep the heat away from any plastic.
  10. If every filter in your house comes with housings, rinse the inside with warm water to remove any manufacturing residue before installing. Lubricate the O-rings and make sure they are tight.
  11. Turn the water back on.
  12. Open all valves except bypass.
  13. Check for leaks. If necessary, tighten threaded connections and filter housing.
  14. Older homes often use their plumbing to ground the electrical system. If this is the case in your home, add a jumper wire (copper wire) from one side of the filter to the other to ensure the ground remains intact. You can do this with the help of grounding clamps.
  15. Flush the entire system for a few minutes. This will remove air, stale water, and plumbing debris.
  16. Follow the manufacturer's instructions for properly activating the filter media.
  17. Once pressure is restored, close all outlets. Finished!

FYI: During normal operation, the bypass valve remains closed. If the system needs service, close both regular valves and open the bypass.


If your manual is missing important details, check some of the resources that can be found online (for example, this website). How about the following installation video?

(Video) Culligan Water Filter Review

start time

As you've seen, installing a complete DIY-style home filter is not difficult at all. Just make sure you have all the necessary tools and components before you start, and follow the manufacturer's instructions to the letter. If in doubt, contact customer service and seek additional help online. Then you'll have your new whole house filtration system ready in no time!

Want more DIY? How about ifCreate your own homemade whole house water filter?

Whole House Water Filtration System Installation | Instructions + Diagram (2)

If you have any questions or comments about installing water filtration throughout your home, feel free to leave a comment below!

About the author Gene Fitzgerald

(Video) Water Filter Buyers' Guide: Pitcher, Fridge, Faucet, Undersink, RO, And Whole House Water Filters

Gene Fitzgerald has been with BOS since the beginning. She is the top content creator and has fully immersed herself in the home water treatment industry only to become an expert. Outside of BOS, Gene enjoys reading books on philosophy and social issues, making music and walking.
learn more aboutGene and the rest of the BOS team.

Whole House Water Filtration System Installation | Instructions + Diagram (3)Whole House Water Filtration System Installation | Instructions + Diagram (4)Whole House Water Filtration System Installation | Instructions + Diagram (5)Whole House Water Filtration System Installation | Instructions + Diagram (6)Whole House Water Filtration System Installation | Instructions + Diagram (7)

Whole House Water Filtration System Installation | Instructions + Diagram (9)


How difficult is it to install a whole house water filtration system? ›

It is not overly complex or difficult to install under sink systems. There should be room under kitchen and bathroom sinks to fit an under-sink water system of each type (reverse osmosis, carbon filtration, and ion exchange). You should only need moderate plumbing skills to install under-sink filtration systems.

How long does it take to install a whole house water filter? ›

Installing a whole house filter system could take an experienced plumber two to four hours. If you're installing it yourself, then it may take a little longer depending on your level of experience.

How do I know if my whole house water filter is working? ›

The most effective way to determine if your water filter is working properly is to test your water before and after it passes through your filter. Such analysis is called performance testing because it tests the effectiveness of your filter in reducing or removing potentially harmful contaminants that pass through.

What order do I put my water filters in? ›

The water should first go through a sediment water filter to reduce sand, dirt, rust, and other sediment. You want to have the water go through a sediment filter first so it does not clog up the carbon filter, which is more expensive. The sediment filter will prolong and protect the carbon filter.

Can I install a water filter myself? ›

Most areas do not require a permit to install a whole house water filter system but, if in doubt (or if you think the job might be too complex for your skills), hire a professional plumber. If you're up for this DIY project, start by choosing a location that is accessible.

How much value does a water filtration system add to a house? ›

Does water filtration systems increase home value? Research indicates that adding a water softener to your home can increase its equity anywhere from $5,000 to $10,000.

Are whole house filters worth it? ›

If you need chlorine-free water 24/7 for your bathing and washing, a whole house water filter will be worth the investment. But if you just need your shower water to get filtered, a shower filter will also be good enough.

Do I need to boil water if I have a whole house water filter? ›

Do I need to boil my tap water if it is filtered? Yes, it is important to boil all tap water even if it has been filtered. Most water filters (activated carbon, charcoal, pitcher filters, etc.) are not suitable for use on microbiologically unsafe water and do not kill bacteria or viruses.

How long does the average whole house water filter last? ›

On average, whole house water filters will last for the following lengths of time: Pre-Filter: Three- to Six Months. Carbon Filter: 12 Months. Post-Filter: Up to One Year.

Does a whole house filter go before or after water softener? ›

In general, if your water supply contains high levels of chlorine or sediment, then you need to install the water filter first. On the other hand, if your water supply has high levels of magnesium and calcium, then the water softener should be installed first.

Does whole house water filtration go before or after water heater? ›

Connect your filtration system directly to the main supply before your water heater. Most water filtration systems are designed to work with cold water and may be ruined if the system uses water from the heater. Even during cleaning you should never run hot water through the system as it may damage it.

How often should you backwash a whole house filter? ›

Simply put, backwash filters will need to backwash once there is noticeable pressure loss through the filter – typically once every 1-2 weeks.

What happens if you overuse a water filter? ›

And aside from sediment, a carbon water filter that is used beyond its days can collect a build-up of other materials and contaminants. This build-up of contaminants often looks like 'goop' and can even leak into your supply of drinking water.

Do you have to run water after replacing filter? ›

Run two to four gallons of water through the new filter. This helps prevent your water dispenser from sputtering and clears impurities left over from manufacturing.

Do whole house water filters reduce water pressure? ›

Disadvantages of whole house water filtration systems:

May decrease water pressure: The water supply runs through the filter at a certain speed. If you are taking a shower, doing laundry, and running your dishwasher at the same time, you may notice a decrease in water pressure.

How many micron should a whole house filter be? ›

Generally, we recommend pleated 50-micron filter cartridges followed by a dual grade 25/1 micron depth filter. For very fine sediment in the range of 1 to 5 microns, we recommend dual-grade depth filters.

Should a carbon filter be installed before or after a water softener? ›

The carbon filter is installed prior to the water softener. This extends the life of the softener by removing chlorine prior to the softener and makes for great clean water through out the home.

Do people attach filter to their faucets in at home? ›

The main reason to install faucet filters in your home is to have a water filtration system that can remove the lingering contaminants found in faucet water. The Environmental Protection Agency (EPA) implemented standards on the amount of over 90 contaminants found in drinking water.

Do plumbers install reverse osmosis systems? ›

Hire a Plumber for RO Installation

If you're worried you don't have the right tools, background knowledge, or time to install the reverse osmosis system, we recommend hiring a local plumber. You can save a lot of money by purchasing the Reverse Osmosis System online, and then hiring a plumber to do the install.

Is it worth it to install a water filter system? ›

It not only aids in preventing rust stains in sinks, tubs, dishwashers, and toilets, but offers softer, brighter and longer lasting clothing. A carbon filter effectively removes chlorine, chloramines, and odor. The outcome is chemical free, clean, fresh drinking water for the whole household.

What should I look for when buying a whole house water filter? ›

6 Tips to Choose Best Whole House Water Filter
  • Understand POE & POU. POE stands for Point of Entry and POU for Point of Use. ...
  • Analyze your supply. ...
  • Find out flow rate of your faucets and dispensers. ...
  • Purpose of filtration. ...
  • Only NSF Certified products. ...
  • Always look for options. ...
  • Seller and manufacturer credibility.
Oct 18, 2018

How much does it cost to filter the whole house? ›

A whole-house system will generally cost at least $1,000, while an individual unit could be as little as $150. The best whole-house water filters treat water as soon as it enters a home and are usually larger in size. They can cost from $1,000 to $4,200 or even more.

How big is a whole house water filtration system? ›

For an average home, the ideal size of a whole house filter should be 4.5″x 20″. On the other hand, large households may need to install filters with a flow rate of 25gpm and 1 1/2 -inch ports.

Can you drink tap water with whole house filter? ›

It is best to use a point-of-entry filter system (where your water pipe enters your house), or whole-house filter system, for VOCs because they provide safe water for bathing and cleaning, as well as for cooking and drinking.

What type of whole house water filter is best? ›

  • The 10 Best Whole House Water Filter Systems of 2023.
  • 3M Aqua-Pure™ AP900 Series Model #AP904.
  • Aquasana Rhino® Well Water with UV Model #EQ-WELL-UV-PRO-AST.
  • G.E. Appliances System Model #GXWH40L.
  • SoftPro Water Systems Whole House Upflow Catalytic Carbon Filter.
  • Whirlpool Central Water Filtration System Model #WHELJ1.
Apr 18, 2023

How many filters do you need for a house? ›

Typically, a house will have 2 air filters in their intake vents. In some cases, there can be more or fewer depending on the square footage of the home or apartment and the number of floors that need to be supported by the central air system.

Is it better to boil or filter tap water? ›

Water filters are way more reliable and more powerful at cleaning water. Boiling water will purify water to some extent, but you'll be drinking “dead” water, poor in nutrients and other useful microelements. The only way to ensure the water you drink is beneficial for your health is to use a high-quality water filter.

Should I buy a water filter or just buy water? ›

Filter water vs. bottled water. Although both filtered water and bottled water can provide healthier, better-tasting water, the cost-effectiveness and smaller environmental impact of filtered water beats out bottled water at every turn.

What happens if you don t change your whole house water filter? ›

Your filter can break down over time, meaning it will no longer be able to filter out the contaminants in your water. If you don't change this before too long, these harmful chemicals and organisms could end up back inside of your home - which defeats the whole purpose of having a water filter.

How many gallons of water do I need after replacing my filter? ›

Once your filter is replaced, run four gallons of water through the line to properly flush the new filter.

How long will a 5000 gallon water filter last? ›

It's good for up to 5,000 gallons. That's about 2-1/2 to 3 years for an average family of four.

Do I need a shower filter if I have a water softener? ›

Water softeners do not filter water, they only remove calcium and magnesium minerals to address hard water. In order to remove contaminants so water is safer for drinking, cooking, and showering — you'll need to use a water filter even if you already have a water softener installed.

Can you drink water that has been softened? ›

Softened water is very safe to drink. Some people worry about the sodium that is released into the water during the softening process, but these concerns are unnecessary. In general, for every milligram of minerals removed from the water, two milligrams of sodium are released.

Does a water softener run through the whole house? ›

A water softener is a whole-house filtration system that removes hardness-causing calcium and magnesium minerals from your water through a process called ion exchange. A water softener addresses one of the most prevalent and devastating water problems: hard water.

Which comes first pump or filter? ›

Since the filter chamber determines the rate of flow into the pump, there is no need to buy more pump capacity than the filter chamber can process. So the filter chamber comes first.

How many stages does it take to filter water? ›

The ideal setup in terms of the cost and performance perspective is 4 stages: sediment filtration, carbon filtration, reverse osmosis, and the post taste refining filter.

Should you always rinse after backwash? ›

Backwashing reverses the flow of water, lifts up and flushes the sand, and then expels the dirty water via a waste line into the ground or drain. In order to prevent residual blow back into the pool, once you've finished backwashing it's highly advisable to rinse the filter.

Can you backwash too long? ›

As eluded to above, if you backwash your pool pump for too long, it runs the risk of introducing air into the system. Air pockets can cause pumps to lose the constant flow of water that they need to keep working. If this happens to your system after a backwash, you may need to prime your swimming pool pump.

How long does it take to flush a whole house water filter? ›

Whether you have a whole-house or commercial water filter or an under-sink filtration system , you need to flush the system for at least five minutes.

What are the negatives of water filters? ›

They don't fit all faucets and can slow down flow, which can be annoying. Faucet filters typically require you to change filters more often than other carbon filter options.

How do I know if my water filter is working properly? ›

The most effective way to determine if your water filter is working properly is to test your water before and after it passes through your filter. Such analysis is called performance testing because it tests the effectiveness of your filter in reducing or removing potentially harmful contaminants that pass through.

Can water filters grow mold? ›

One of the most recurring problems with water filters across all brands is the growth of mold and the constant combat of that. Most mold is harmless but having mold in your drinking water could present serious hazards to your health. And of course, if you're using a water filter, your aim is to prevent that.

What to do after installing new water filter? ›

It is recommended that you flush your filter after installing a new one. Flushing your filter means to run water through it several times before using the filter for consumption.

Why is my water black after changing filter? ›

If the filter is newly installed or just recently changed, black particles may be noticed in the water. These black particles are fine carbon particles left over from the manufacturing process. To correct: Flushing the system as outlined in the install instructions will eliminate this situation.

How long do I run my new water filter before drinking the water? ›

When you use your filter for the first time ONLY, run cold water for five minutes. After that, your filter is ready for use whenever you turn on your faucet.

How much is a full house filtration system? ›

Whole House Water Filtration System Cost Range

Most homeowners pay between $900 – $3,100 for water filtration system installed by a pro. The cost ranges from about $360 for a basic DIY system to more than $3,500 for a professionally installed system with advanced filtration features.

Are whole house sediment filters worth it? ›

If you're experiencing any of the problems listed above, a whole house water filter is worth it. More than just a water filter for your faucet, these filters help t take hard or problem water and turn it into cleaner, safer water that's better for your entire home and family.

How long do whole house filters last? ›

Generally speaking, a whole house water filter is meant to last no longer than 12 months. As long as you understand when to change your filter and signs that it's time to do so, you never have to concern yourself with waiting too long.

How long does a whole house filtration system last? ›

On average, whole house water filters will last for the following lengths of time: Pre-Filter: Three- to Six Months. Carbon Filter: 12 Months. Post-Filter: Up to One Year.

How much does labor cost to install a water filter system? ›

Water filtration system installation labor cost

Labor costs to install a water filtration system average $200 to $300 if you plan to hire a pro to do the work. If you are in the market for a whole house water filtration system, you can take the DIY approach, or you can hire a professional to do the work.

How big of a whole house filter do I need? ›

For an average home, the ideal size of a whole house filter should be 4.5″x 20″. On the other hand, large households may need to install filters with a flow rate of 25gpm and 1 1/2 -inch ports.

How often should you filter your whole house water? ›

Whole House Filters

To maintain the best quality and reliability of your whole house water filter, it is recommended that you change it every three to six months. This helps to keep the water free from impurities and contaminants that can be harmful to your health, your home's plumbing system, and your appliances.

How many gallons of water does a whole house filter hold? ›

Good quality whole house 4.5" x 20" carbon filter cartridges will last 100,000 – 150,000 gallons in normal municipal water supplies.

Which is better sediment filter or carbon filter? ›

While all are effective, activated carbon block filters generally remove more contaminants because of their greater surface area.

What are the disadvantages of filtered water? ›

The Cons of a Water Filtration System:
  • Speaking of cost, initial installation is more expensive than other filtration methods. ...
  • You can't pick and choose what gets filtered. ...
  • Fluoride and your teeth: If you choose a whole house water filtration system that removes ALL chemicals, you will also be removing fluoride.
Apr 12, 2019


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